Malicious PDF — malware analysis report

Static analysis result for SHA-256 386077aa8026ef77…

MALICIOUS

PDF

84.5 KB Created: 2021-04-11 18:31:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1626c7f2a088b985c075432762743347 SHA-1: d0c95062ea2b26339a46d79cf32e14944a73eb0f SHA-256: 386077aa8026ef77b5cebd3fbcda5567068bf2317584afacbfc0e89365ea2d3f
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains an embedded URL that redirects to a suspicious domain, identified by heuristics as a link farm on disposable hosting and flagged by ML classifiers as malicious. The ClamAV detection and ML model output strongly indicate malicious intent, likely for phishing or a scam. The document body, though heavily obfuscated, contains text related to setting up a smart pet feeder, which serves as a lure to encourage users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pelibifir.ru/strik?utm_term=how+to+set+up+smart+pet+feeder PDF link annotation
    • http://rawiduti.medianewsonline.com/simple_action_plan_template.pdfIn PDF document text
    • https://zafubunemajuz.weebly.com/uploads/1/3/5/3/135314528/zedukekojisonen_jajurawitaj_davofad_ruriri.pdfIn PDF document text
    • http://lidudopunabiril.22web.org/92130239241.pdfIn PDF document text
    • https://zanixikowupu.weebly.com/uploads/1/3/1/4/131437740/wogelopujazap.pdfIn PDF document text
    • http://zovitidagawas.sportsontheweb.net/welding_workshop.pdfIn PDF document text
    • https://walagewujiw.weebly.com/uploads/1/3/0/9/130968979/fd0aec8.pdfIn PDF document text
    • http://fodelogutejamit.getenjoyment.net/tabeer_ur_roya_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lejesapazud/65ExvZ7/34714518775.pdfIn PDF document text
    • http://xuxelenoxuze.iblogger.org/82960014760.pdfIn PDF document text
    • https://cdn.sqhk.co/duwokarewesu/eYicjhy/the_maxx_comic_series.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/19a642fb-35e5-4255-8574-92a09234c9ab/fomajopajidulukekemeret.pdfIn PDF document text
    • http://vivotes.rf.gd/restricted_airspace_sectional_chart.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/the_rising_of_the_shield_hero_season_2_release_date_anime.pdfIn PDF document text
    • http://pasofotamuteper.atwebpages.com/16169952638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e393039c-4914-4479-b993-b4e578bd4bcf/warrior_cat_kittypet_names.pdfIn PDF document text
    • http://vawerudarasikow.myartsonline.com/57604756643.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bce8855-e347-4344-b220-3e6ab3cc5e5a/26499952572.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF320 2900 bytes
SHA-256: 9c84aca5171cf4522e1fd23f3e5391e17c8e645cdcb740b4c3036af6865bd014
font_01_sfnt_off0000fd65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD65 4936 bytes
SHA-256: 5dca43b25e4727a2090c9bcaa38b1041f1df5e18b96e69d1bbe281b1c7a82349
font_02_sfnt_off00010e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3B 11212 bytes
SHA-256: abae14ba57c2b8a19ef778e584e4992af669ad47af5d4333bce78199b7ed9c71
font_03_sfnt_off00013479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13479 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230